drivers/net/wireless/ralink/rt2x00/rt2x00leds.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ralink/rt2x00/rt2x00leds.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ralink/rt2x00/rt2x00leds.c
Extension
.c
Size
5980 bytes
Lines
234
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
	<http://rt2x00.serialmonkey.com>

 */

/*
	Module: rt2x00lib
	Abstract: rt2x00 led specific routines.
 */

#include <linux/kernel.h>
#include <linux/module.h>

#include "rt2x00.h"
#include "rt2x00lib.h"

void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi)
{
	struct rt2x00_led *led = &rt2x00dev->led_qual;
	unsigned int brightness;

	if ((led->type != LED_TYPE_QUALITY) || !(led->flags & LED_REGISTERED))
		return;

	/*
	 * Led handling requires a positive value for the rssi,
	 * to do that correctly we need to add the correction.
	 */
	rssi += rt2x00dev->rssi_offset;

	/*
	 * Get the rssi level, this is used to convert the rssi
	 * to a LED value inside the range LED_OFF - LED_FULL.
	 */
	if (rssi <= 30)
		rssi = 0;
	else if (rssi <= 39)
		rssi = 1;
	else if (rssi <= 49)
		rssi = 2;
	else if (rssi <= 53)
		rssi = 3;
	else if (rssi <= 63)
		rssi = 4;
	else
		rssi = 5;

	/*
	 * Note that we must _not_ send LED_OFF since the driver
	 * is going to calculate the value and might use it in a
	 * division.
	 */
	brightness = ((LED_FULL / 6) * rssi) + 1;
	if (brightness != led->led_dev.brightness) {
		led->led_dev.brightness_set(&led->led_dev, brightness);
		led->led_dev.brightness = brightness;
	}
}

static void rt2x00led_led_simple(struct rt2x00_led *led, bool enabled)
{
	unsigned int brightness = enabled ? LED_FULL : LED_OFF;

	if (!(led->flags & LED_REGISTERED))
		return;

	led->led_dev.brightness_set(&led->led_dev, brightness);
	led->led_dev.brightness = brightness;
}

void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev, bool enabled)
{
	if (rt2x00dev->led_qual.type == LED_TYPE_ACTIVITY)
		rt2x00led_led_simple(&rt2x00dev->led_qual, enabled);
}

void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled)
{
	if (rt2x00dev->led_assoc.type == LED_TYPE_ASSOC)
		rt2x00led_led_simple(&rt2x00dev->led_assoc, enabled);
}

void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled)
{
	if (rt2x00dev->led_radio.type == LED_TYPE_RADIO)
		rt2x00led_led_simple(&rt2x00dev->led_radio, enabled);
}

Annotation

Implementation Notes